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Why ordinary silicon diodes do not emit light?
Silicon is opaque to all light (IR through UV).The bandgap of silicon is not high enough to produce visible photons, only IR photons.
Explain the construction and working of LASCR?
it is a light activated silicon controlled rectifier that uses light to trigger the scr instead of a signal at the gate. The window for the light activation is where the gate normally is and the ligth excites the electrons thus triggering the scr. The Light Activated Silicon Control Rectifies start conduction when it is forward biased. For this purpose the cathode is kept at negative positional and anode is at positive positional. We apply a positive clock at the gate terminal and so the Silicon Control Rectifies turns ON. When forward bias voltage is applied to the Light Activated Silicon Control Rectifies, or applied light of a required level the junction J1 and J3 become forward bias while the junction J2 become reverse bias. When we apply a clock pulse at the gate terminal, the junction J2 become forward bias and the Light Activated Silicon Control Rectifies start conduction. The Light Activated Silicon Control Rectifies turn ON and OFF very quickly, At the OFF state the Light Activated Silicon Control Rectifies provide infinity resistance and in ON state, it offers very low resistance, which is in the range of 0.01Ω to 1Ω Tags:
Why a diode cannot emit?
A diode cannot emit light because it primarily functions as a semiconductor device that allows current to flow in one direction, facilitating electronic control rather than light emission. While certain types of diodes, like light-emitting diodes (LEDs), are specifically designed to emit light through electroluminescence when current passes through them, standard diodes do not possess the necessary materials or structure to produce light. Their operation focuses on rectifying current, rather than generating photons.
What is the difference between silicon and germanium semiconductors?
integrated circuits and components made in GaAs are much faster than silicon because its low field electron mobility is larger than silicon. GaAs has ability to emit light used in leds,lasers and microwave emitter used in cellular phones
What is the most familiar semiconductor?
silicon and germanium
Why Silicon and germanium emit light?
Silicon and germanium are indirect bandgap semiconductors, which means that they do not naturally emit light. In order for these materials to emit light, they need to be doped with specific impurities or be subjected to external stimuli such as electrical current or radiation to create a population inversion and stimulate light emission through processes like electroluminescence or photoluminescence.
Why ordinary silicon diodes do not emit light?
Silicon is opaque to all light (IR through UV).The bandgap of silicon is not high enough to produce visible photons, only IR photons.
Do light bulbs emit light or suck dark?
Light bulbs emit light.
Do light bulbs emit light or suck in dark?
bulbs emit light
Does technetium emit light?
Technetium doesn't emit light.
How does the earth emit light?
The Earth does not emit light, it like the moon reflects light
What is the smell of silicon?
Silicon itself is odorless. However, the production of silicon-based materials may involve the use of chemicals or solvents that can emit odors.
Does every light source emit only one type of light, or can some light sources emit multiple types of light?
Some light sources can emit multiple types of light, such as white light sources that emit a combination of different colors.
Do light bulbs emit radiation, and if so, what type of radiation do they emit?
Yes, light bulbs emit radiation in the form of visible light.
Why ordinary silicon diode does not emit light?
The energy band gap between the cathode and anode is too small to generate photons of higher energy than far IR.Silicon is opaque to visible light (and even IR).
Do all light waves emit radiation?
Light waves do not emit radiation, light waves are radiation.
Does the sun and moon emit light?
the sun only emit light. not the moon. it will reflect the light of the sun.
